JPH07286598A - Centrifugal fan provided with fluid deflector - Google Patents

Centrifugal fan provided with fluid deflector

Info

Publication number
JPH07286598A
JPH07286598A JP10190994A JP10190994A JPH07286598A JP H07286598 A JPH07286598 A JP H07286598A JP 10190994 A JP10190994 A JP 10190994A JP 10190994 A JP10190994 A JP 10190994A JP H07286598 A JPH07286598 A JP H07286598A
Authority
JP
Japan
Prior art keywords
fluid
fluid deflector
inner diameter
flow
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10190994A
Other languages
Japanese (ja)
Inventor
Ichiro Hirakawa
一朗 平川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP10190994A priority Critical patent/JPH07286598A/en
Publication of JPH07286598A publication Critical patent/JPH07286598A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To provide a centrifugal fan of high efficiency by reducing fluid pressure loss of a fluid deflector to prevent peeling of fluid, and improving flow. CONSTITUTION:A flow regulation plate 8 is provided on the inner side of a fluid deflector 6 of a plate thickness (t) formed in the form of a horn, a blade entrance width of an impeller is B, an axial distance between a side plate 4 and the flow regulation plate 8 is W, an inner diameter of the fluid deflector 6, a half peak angles of two conical surfaces of the flow regulation plate 8 are alpha beta (alpha+beta), an entrance inner diameter of the flow regulation plate 8 is D2, an inner diameter of a crossing circle of the two conical surfaces is D2, a depth inner diameter of the flow regulation plate 8 is D3, and a shaft diameter of a rotor l is d1, then 0.2B<=W<=0.3B, (0.5D1<2>+0.2d1<2>)<1/2=D2<= (0.7D1<2>+0.8d<1>2)<1/2>, (0.7D1<2>:0.3d1<2>)<1/2=D3<=(0.9D1-<2>+0.9D1<2>+0.1d1<2>)<1/2>, D4=D1+2t0.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は通風を曲げて案内する流
体ディフレクタ付遠心ファンの性能向上に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the performance of a centrifugal fan with a fluid deflector for bending and guiding ventilation.

【0002】[0002]

【従来の技術】従来例の流体ディフレクタ付遠心ファン
を図3によって説明する。図3は該流体ディフレクタ付
遠心ファンの概略断面図であり、該遠心ファンは、ロー
タ1とこれに取付けられた主板2、側板4、羽根3及び
口金5から成る羽根車と、吸込口に設けられた流体ディ
フレクタ6とから構成されている。遠心ファンに流入す
る気流9は流体ディフレクタ6により半径方向の流れを
軸方向へ曲げ、さらにその軸方向の流れを再び放射方向
に曲げて羽根車に流入させている。前記のように半径方
向の流れを軸方向に曲げ、次いで軸方向流れを半径方向
に曲げる機能を有する流体ディフレクタ付遠心ファンに
おいて、流体ディフレクタの形状の最適化による圧力損
失の低減と流れの改善は、遠心ファンの高性能化対策と
して大切な要素である。
2. Description of the Related Art A conventional centrifugal fan with a fluid deflector will be described with reference to FIG. FIG. 3 is a schematic sectional view of the centrifugal fan with a fluid deflector. The centrifugal fan is provided with a rotor 1, an impeller including a main plate 2, side plates 4, blades 3 and a cap 5 attached to the rotor 1 and a suction port. And the fluid deflector 6 that is formed. The airflow 9 flowing into the centrifugal fan is bent in the radial direction by the fluid deflector 6 in the axial direction, and the axial flow is bent again in the radial direction to flow into the impeller. As described above, in a centrifugal fan with a fluid deflector having a function of bending a radial flow in an axial direction and then bending an axial flow in a radial direction, reduction of pressure loss and improvement of flow by optimizing a shape of a fluid deflector can be achieved. , Is an important factor for improving the performance of centrifugal fans.

【0003】次に前記従来例の作用を説明する。前記遠
心ファンでは気流9は流体ディフレクタ6を通って回転
している羽根車の口金5から軸方向に流入し半径方向に
向きを変えて羽根3を通って放出される。
Next, the operation of the conventional example will be described. In the centrifugal fan, the air flow 9 passes through the fluid deflector 6 from the base 5 of the rotating impeller in the axial direction, changes in the radial direction, and is discharged through the vanes 3.

【0004】[0004]

【発明が解決しようとする課題】流体ディフレクタはフ
ァン効率向上に有効であるが、適切な流体ディフレクタ
を用いなければ圧力損失を増大し、流体の流れを乱して
ファン効率が低下し、場合によっては流れの剥離により
ファンが失速することもある。また適切な流体ディフレ
クタを得るために多円弧構造とすると製造が困難になり
製造コストも高価なものとなる。
The fluid deflector is effective for improving the fan efficiency, but unless a proper fluid deflector is used, the pressure loss increases and the flow of the fluid is disturbed to lower the fan efficiency. The fan may stall due to flow separation. If a multi-arc structure is used to obtain an appropriate fluid deflector, it will be difficult to manufacture and the manufacturing cost will be high.

【0005】本発明の目的は流体ディフレクタの流体圧
力損失を低減し、流体の剥離を防止し流れを改善するこ
とにより高効率の遠心ファンを安価に提供するにある。
An object of the present invention is to provide a highly efficient centrifugal fan at low cost by reducing the fluid pressure loss of the fluid deflector, preventing fluid separation and improving the flow.

【0006】[0006]

【課題を解決するための手段】本発明の流体ディフレク
タ付遠心ファンは、ラッパ状に形成され半径方向内側に
向けて流入する流体を軸方向に流し、ついで該軸方向に
向って流れる流体を放射方向へ曲げる機能を有する流体
ディフレクタの内部に回転体である羽根車を配設してな
る遠心ファンにおいて、板厚tの流体ディフレクタ6の
内側に2つの円錐面より形成された整流板8が設けら
れ、羽根車の羽根入口巾をB、羽根車の側板4から整流
板取付後端位置までの寸法をWとし、前記流体ディフレ
クタの円筒部内径をD1 、整流板8の入口側内径を
2 、出口側内径をD4 、整流板8を形成する両円錐面
の交差円の内径をD3 、前部及び後部円錐面の半頂角を
それぞれα,β(α<β)、ロータ1軸の直径をd1
するとき、 0.2B≦W≦0.3B、 (0.5D1 2+0.2d1 21/2 ≦D2 ≦(0.7D1 2
+0.8d1 21/2 、 (0.7D1 2+0.3d1 21/2 ≦D3 ≦(0.9D1 2
+0.1d1 21/2 、 D4 =D1 +2t であることを特徴としている。
A centrifugal fan with a fluid deflector according to the present invention is formed in a trumpet shape and causes a fluid flowing inward in the radial direction to flow in an axial direction and then radiates a fluid flowing in the axial direction. In a centrifugal fan in which an impeller, which is a rotating body, is disposed inside a fluid deflector having a function of bending in a direction, a flow straightening plate 8 formed of two conical surfaces is provided inside a fluid deflector 6 having a plate thickness t. Let B be the blade inlet width of the impeller, W be the dimension from the side plate 4 of the impeller to the rear end position of the flow straightening plate mounting, the inner diameter of the cylindrical portion of the fluid deflector is D 1 , and the inner diameter of the flow straightening plate 8 on the inlet side is D. 2 , the outlet inner diameter is D 4 , the inner diameter of the intersecting circle of both conical surfaces forming the straightening plate 8 is D 3 , the half apex angles of the front and rear conical surfaces are α and β (α <β), and the rotor 1 when the diameter of the shaft and d 1, 0.2B ≦ W ≦ .3B, (0.5D 1 2 + 0.2d 1 2) 1/2 ≦ D 2 ≦ (0.7D 1 2
+ 0.8d 1 2 ) 1/2 , (0.7D 1 2 + 0.3d 1 2 ) 1/2 ≤ D 3 ≤ (0.9D 1 2
It is characterized in that + 0.1d 1 2 ) 1/2 and D 4 = D 1 + 2t.

【0007】[0007]

【作用】本発明を実施することにより流体が流体ディフ
レクタ6に沿って流れ、ついで軸方向から放射方向に変
向する。この流体流れの方向が変向する位置に整流板8
を設置したので、流体流れが途中で軸方向から放射方向
に曲るため、羽根車の口金付近の側板側流れ10に部分
的剥離や渦の発生するのを防止し、羽根入口に流入する
流れを整流してファンの効率を改善できる。これにより
従来の流体ディフレクタ付遠心ファンに比べてファン効
率が約20%上昇する。また同様の効率を有する多円弧
で構成される流体ディフレクタより安価に製造できるメ
リットがある。
By practicing the invention, the fluid flows along the fluid deflector 6 and is then deflected from the axial direction to the radial direction. The current plate 8 is placed at a position where the direction of the fluid flow is changed.
Since the fluid flow is bent from the axial direction to the radial direction on the way, partial separation and vortex are prevented from occurring in the side plate side flow 10 near the base of the impeller, and the flow flowing into the blade inlet is Can be rectified to improve fan efficiency. As a result, the fan efficiency is increased by about 20% as compared with the conventional centrifugal fan with a fluid deflector. Further, there is an advantage that it can be manufactured at a lower cost than a fluid deflector composed of multiple arcs having the same efficiency.

【0008】[0008]

【実施例】本発明に係る第1実施例を図1、2によって
説明する。図1は本発明に係る第1実施例の流体ディフ
レクタ付遠心ファンの概略断面図、図2は図1のA−A
断面図である。図において、ラッパ状に形成された流体
ディフレクタ6の半径方向内側に複数のリブ7を介して
2つの円錐面よりなる整流板8を接合する。流体ディフ
レクタ6の中心部にロータ1と、主板2、羽根3、側板
4、口金5から成る羽根車を挿入し流体ディフレクタ6
のセンタまわりに回転自在に設置する。羽根2の入口巾
をB、側板4と整流板6の奥の端面までの軸方向寸法を
Wとする。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic sectional view of a centrifugal fan with a fluid deflector according to a first embodiment of the present invention, and FIG. 2 is AA of FIG.
FIG. In the figure, a straightening vane 8 having two conical surfaces is joined to the inside of a fluid deflector 6 formed in a trumpet shape in the radial direction via a plurality of ribs 7. The rotor 1 and the impeller composed of the main plate 2, the blades 3, the side plates 4 and the cap 5 are inserted into the center of the fluid deflector 6 and the fluid deflector 6 is inserted.
It is rotatably installed around the center of. Let B be the inlet width of the blades 2 and W be the axial dimension up to the inner end faces of the side plate 4 and the straightening plate 6.

【0009】板厚tの流体ディフレクタ6の内径を
1 、整流板8の入口側内径をD2 、出口側内径を
4 、整流板8を形成する前部及び後部円錐面の交差円
の内径をD3の半頂角をそれぞれα,β(α<β)、ロ
ータ1の軸径をd1 とするとき、 0.2B≦W≦0.3B、 (0.5D1 2+0.2d1 21/2 ≦D2 ≦(0.7D1 2
+0.8d1 21/2 、 (0.7D1 2+0.3d1 21/2 ≦D3 ≦(0.9D1 2
+0.1d1 21/2 、 D4 =D1 +2t である。
The inner diameter of the fluid deflector 6 having the plate thickness t is D 1 , the inner diameter of the rectifying plate 8 on the inlet side is D 2 , and the inner diameter of the rectifying plate 8 is D 4 on the intersection circle of the front and rear conical surfaces forming the rectifying plate 8. When the half-vertical angles of the inner diameter D 3 are α and β (α <β) and the shaft diameter of the rotor 1 is d 1 , 0.2B ≦ W ≦ 0.3B, (0.5D 1 2 + 0.2d 1 2 ) 1/2 ≤ D 2 ≤ (0.7D 1 2
+ 0.8d 1 2 ) 1/2 , (0.7D 1 2 + 0.3d 1 2 ) 1/2 ≤ D 3 ≤ (0.9D 1 2
+ 0.1d 1 2 ) 1/2 and D 4 = D 1 + 2t.

【0010】前記第1実施例の作用を説明する。気流9
は流体ディフレクタ6に沿って流れ整流板8の位置で軸
方向の流れから放射方向にその方向を変えるため、羽根
車の口金5付近の側板側流れ10に発生する流れの部分
的剥離及び渦を防止し、羽根入口に流入する流れを整流
改善する。前記作用により従来の流体ディフレクタ付遠
心ファンに比べてファン効率が約20%上昇する。また
同様の効率を有する多円弧で構成される流体ディフレク
タより安価に製造できる。
The operation of the first embodiment will be described. Airflow 9
Changes its direction from the axial flow to the radial direction at the position of the flow straightening plate 8 along the fluid deflector 6, so that partial separation and vortex of the flow generated in the side plate side flow 10 near the base 5 of the impeller are generated. Prevent and improve the flow rectifying the flow entering the blade inlet. Due to the above action, the fan efficiency is increased by about 20% as compared with the conventional centrifugal fan with a fluid deflector. Further, it can be manufactured at a lower cost than a fluid deflector composed of multiple arcs having the same efficiency.

【0011】[0011]

【発明の効果】本発明は流体の流れをスムーズにし流体
圧力損失を低減させ、遠心ファン効率を向上し高効率の
遠心ファンを安価に提供できる。
According to the present invention, a fluid flow can be made smooth, fluid pressure loss can be reduced, centrifugal fan efficiency can be improved, and a highly efficient centrifugal fan can be provided at low cost.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る第1実施例の流体ディフレクタ付
遠心ファンの概略図面図。
FIG. 1 is a schematic drawing of a centrifugal fan with a fluid deflector according to a first embodiment of the present invention.

【図2】図1のA−A断面図。FIG. 2 is a sectional view taken along line AA of FIG.

【図3】従来例の流体ディフレクタ付遠心ファンの概略
断面図。
FIG. 3 is a schematic sectional view of a conventional centrifugal fan with a fluid deflector.

【符号の説明】[Explanation of symbols]

1…ロータ、2…主板、3…羽根、4…側板、5…口
金、6…流体ディフレクタ、7…リブ、8…整流板、9
…気流、10…側板側流れ。
1 ... Rotor, 2 ... Main plate, 3 ... Blade, 4 ... Side plate, 5 ... Base, 6 ... Fluid deflector, 7 ... Rib, 8 ... Rectifier plate, 9
... air flow, 10 ... side plate side flow.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ラッパ状に形成され半径方向内側に向け
て流入する流体を軸方向に流し、ついで該軸方向に向っ
て流れる流体を放射方向へ曲げる機能を有する流体ディ
フレクタの内部に回転体である羽根車を配設してなる遠
心ファンにおいて、板厚tの流体ディフレクタ(6)の
内側に2つの円錐面より形成された整流板(8)が設け
られ、羽根車の羽根入口巾をB、羽根車の側板(4)か
ら整流板取付後端位置までの寸法をWとし、前記流体デ
ィフレクタの円筒部内径をD1、整流板(8)の入口側
内径をD2 、出口側内径をD4 、整流板(8)を形成す
る両円錐面の交差円の内径をD3 、前部及び後部円錐面
の半頂角をそれぞれα,β(α<β)、ロータ(1)軸
の直径をd1 とするとき、 0.2B≦W≦0.3B、 (0.5D1 2+0.2d1 21/2 ≦D2 ≦(0.7D1 2
+0.8d1 21/2 、 (0.7D1 2+0.3d1 21/2 ≦D3 ≦(0.9D1 2
+0.1d1 21/2 、 D4 =D1 +2t であることを特徴とする流体ディフレクタ付遠心ファ
ン。
1. A rotating body is provided inside a fluid deflector which is formed in a trumpet shape and has a function of causing a fluid flowing inward in a radial direction to flow in an axial direction and then bending the fluid flowing in the axial direction in a radial direction. In a centrifugal fan having a certain impeller, a flow straightening plate (8) formed of two conical surfaces is provided inside a fluid deflector (6) having a plate thickness t, and the impeller blade inlet width is set to B. , W is the dimension from the side plate (4) of the impeller to the rear end position of the straightening vane, the inner diameter of the cylindrical portion of the fluid deflector is D 1 , the inner diameter of the straightening vane of the straightening plate (8) is D 2 , and the inner diameter of the outlet is D 4 , the inner diameter of the intersection circle of both conical surfaces forming the straightening vane (8) is D 3 , the half apex angles of the front and rear conical surfaces are α, β (α <β), and the rotor (1) axis is when the diameter as d 1, 0.2B ≦ W ≦ 0.3B , (0.5D 1 2 +0.2 1 2) 1/2 ≦ D 2 ≦ (0.7D 1 2
+ 0.8d 1 2 ) 1/2 , (0.7D 1 2 + 0.3d 1 2 ) 1/2 ≤ D 3 ≤ (0.9D 1 2
A centrifugal fan with a fluid deflector, characterized in that + 0.1d 1 2 ) 1/2 and D 4 = D 1 + 2t.
JP10190994A 1994-04-15 1994-04-15 Centrifugal fan provided with fluid deflector Withdrawn JPH07286598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10190994A JPH07286598A (en) 1994-04-15 1994-04-15 Centrifugal fan provided with fluid deflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10190994A JPH07286598A (en) 1994-04-15 1994-04-15 Centrifugal fan provided with fluid deflector

Publications (1)

Publication Number Publication Date
JPH07286598A true JPH07286598A (en) 1995-10-31

Family

ID=14313045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10190994A Withdrawn JPH07286598A (en) 1994-04-15 1994-04-15 Centrifugal fan provided with fluid deflector

Country Status (1)

Country Link
JP (1) JPH07286598A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041517A (en) * 2007-08-10 2009-02-26 Mitsubishi Heavy Ind Ltd Centrifugal blower and air conditioning device for vehicle
JP2015081507A (en) * 2013-10-21 2015-04-27 リンナイ株式会社 Centrifugal fan
CN107489655A (en) * 2017-09-29 2017-12-19 扬州大学 Pump installation bell-shaped inflow passage with the suitable flowing plate of activity
CN107965471A (en) * 2017-05-08 2018-04-27 宁波方太厨具有限公司 A kind of current collector and application have the centrifugal blower of the current collector
CN110332123A (en) * 2019-08-06 2019-10-15 浙江理工大学 A kind of Multistage centrifugal pump interstage runner flow-stopping plate performance testing device and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041517A (en) * 2007-08-10 2009-02-26 Mitsubishi Heavy Ind Ltd Centrifugal blower and air conditioning device for vehicle
JP2015081507A (en) * 2013-10-21 2015-04-27 リンナイ株式会社 Centrifugal fan
CN107965471A (en) * 2017-05-08 2018-04-27 宁波方太厨具有限公司 A kind of current collector and application have the centrifugal blower of the current collector
CN107965471B (en) * 2017-05-08 2024-04-12 宁波方太厨具有限公司 Current collector and centrifugal fan applying same
CN107489655A (en) * 2017-09-29 2017-12-19 扬州大学 Pump installation bell-shaped inflow passage with the suitable flowing plate of activity
CN107489655B (en) * 2017-09-29 2019-06-07 扬州大学 Pump installation bell-shaped inflow passage with the suitable flowing plate of activity
CN110332123A (en) * 2019-08-06 2019-10-15 浙江理工大学 A kind of Multistage centrifugal pump interstage runner flow-stopping plate performance testing device and method
CN110332123B (en) * 2019-08-06 2024-04-05 浙江理工大学 Device and method for testing performance of flow baffle plate of interstage flow passage of multistage centrifugal pump

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Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20010703